Centrifugal governor.



P. A. PETERSON.

GENTRIFUGAL GOVERNOR.

APPLICATION FILED MAILB. I912,

Patented June 17, 1913.

I I I II 7 I T all whom it may concern:-

s'r'rs r rnnr OFFICE- PER ARVID PETERSON, OF TRENTON, NEW JERSEY,ASSIGNOR TO DE LAVAL STEAM TURBINE COMPANY, OF NEW YORK, NI Y.. ACORPORATION OF NEW JERSEY.

CENTRI FUGAL GOVERNOR.

Specification of Letters Patent.

Application filed March 8, 1912. Serial No. 682,456.

Be it known that I, PER Anvil) Pn'rnnson, a subject of the King ofSweden, and a resident of Trenton, in the county of Mercer and State ofNew Jersey, have invented certain new and useful Improvements inCentrifugal Governors, of which the following v is a specification.

My invention relates to improvements in centrifugal governors, andcomprises, within a single governor structure, a plurality of sets ofgoverning weights, rotating in unlson but controlling independentlyseparate valve controlling means.

My invention is particularly applicable to mixed pressure turbines, thatis to say,

turbines deriving working fluid from a plurality of sources; but myinvention is also applicable to various other types of engines andmachinery. 7

The object of my invention is to produce a simple and compact governoradapted to control independently a plurality of valves ofvalve-controlling means.

I will now proceed to describe my invention with reference to theaccompanying drawings and will then point out the novel features inclaims.

In said drawings: Figure 1 shows a central vertical section of agovernor embodying my invention, the said view also indicating,diagrammatically, the independent control by said governor of aplurality of valve-controlling means. Fig. 2 shows a top view of themechanism of the governor, the inclosing case of the governor beingshown in horizontal section.

In the drawings 1 designates the governor shaft, arranged to, be rotatedby suitable means not shown, and 2 designates a casing mounted onsaidshaft, to rotate therewith, said casing comprising a removable cover3. 4 designates a hollow spacing member, of cross shape, also mounted onshaft 1 and 6,6 designate one set of governor weights and 7, 7 a secondset of governor weights, all located. within casing 2. As indicated, thewelglnts 6, 6 and 7, 7 are of segmental form, andabut against thespacing member 5, there being suitable clearance between ad' The twoabutments 9 of weights (3, 6 are coned to slide in suitable apertures incasing 2, and the springs 8 bear against the heads of these abutmentsand against the inner walls of the weights 6 and 7 respectively.

nected by a tension rod 10 having a central apertured portion 11 throughthe aperture of which passes the-tension rod 12 of the weights 7, 7.Each tension rod has at one end a head engaging one of the abutments 9,and at the other end has a threaded portion engaging a correspondinglythreaded aperture of the other abutment 9; the construction being such,as will be seen, that the tension of the springs of each independentgovernor weight structure may be adjusted by rotating one of theabutments' 9 of that structure.

A sleeve 13 is mounted upon shaft 1 to rotate therewith but to slidelongitudinally thereon, and is provided with a flanged collar 14 adaptedfor engagement by the usual yoke of a valve-gear-control lever. Anothersleeve, 15,'is mounted to slide upon sleeve 13, and is provided with agroove 16 adapted for engagement by another valvegear-control lever.Sleeve 13 is connected by links 17 (one only of which is indicated inFig. 1) and by bell crank levers 18 pivoted to governor casing 2, to thetwo weights 6; and sleeve 15 is connected by similar links 19 and bellcranks 20 (oneof which bell cranks is in front of the plane of sectionof Fig. 1, and is therefore shown in dotted lines only in that figure)to weights 7 It will be clear from,t-he foregoing description that whenshaft 1 rotates and casing 2 rotates with it, both weight-structures 6,6 and 7, 7 will rotate with the shaft and will be subject to the samecentrifugal forces, but that the springs of these two governor weightstructures may have different tensions, and that the weights of oneweightstructure may be of a weight different from that of the, weightsof the other weight structure, as required by particular circumstances,and that the one set of governor weights may move. toward or from thecenter of rotation, independent of the other set of governor weights, sothat each set of governor weights may control its particularvalve-control mechanism independent of the, control of anothervalve-control mechanism by the other set of governor Weights. It willalso be clear that each set of governor weights is always in rotativebalance with respect to shaft 1, and therefore that the entire governorweight structure is always in rotative balance with respect to saidshaft.

In Fig. 1 I have indicated diagrammatically means for the control ofvalves by said independent governor weight structures,

such means comprising levers 21, one adapted to engage collar 14, theother to engage sleeve 15, said levers 21 pivoted. to piston rods 22 ofsuitable valve-actuating fluidpressure cylinders 23, the said pistonrods 22 being also connected to lift-valves 24, and

the levers 21 being also connected by valverods- 25 to suit-able slidepilot-valves 26 arranged to control the supply of fluid under pressureto cylinders 23 and therefore to effect movement of the pistons ofcylinders 23 when the. governor, for any reason, changes the positionsof levers 21.

It will be obvious that since both weights of each setorweight-structure are connected, by similar levers to the samevalvecontrol means (sleeve 13 or sleeve 15), the

'rotaryweight-carrier, aplurality of indetwo weights of eachweight-structure are always in rotative balance, and move inward andoutward simultaneously and to the same extent.

I What I claim is 1. A centrifugal governor comprising a v pendentweights mounted thereon to move pendent weight-structures mountedthereon to move toward and from the center of rotation thereof,- eachsuch weight structure comprising a plurality of weights in rotativebalance with respect to one another, independent governor-springs forsaid separate weight-structures, independent valve- ,control means forsaid independent weightstructures, and means for transmitting motionfrom each of such independent weightstructures to the correspondingvalve-control means.

3. A pentrifugal governor comprising a- -rotary weight-carrier, aplurality of independent weight-structures, said weight structures eachcomprising a plurality of oppositely-disposed weights in rotativehalance, spacing means on said carrier adapted to space the weightsapart, independent roe aces tures, and means for transmitting motionfrom each of such independent weight-structures to the correspondingvalve-control means.

4. A centrifugal governor comprising a rotary weight-carrier, spacingmeans car ried thereby, a. plurality of sets of governor weights, eachset comprising two weights spacing means, a separate spring for eacheach spring acting against one. of said weightsand against one of saidabutinents,

each, such tension'rod having a screw-thread connection with one of saidabutments, for the adjustment of spring-action, one of said tension rodshaving, near the center of rotation, an aperture through which passesthe tension rod of another of said sets of weights, and means fortransmitting inward and outward motion of the weights-of each set tovalve-control means.

tary weight-carrier, hollow spacing means carried thereby, a pluralityof sets of-governo-r weights arranged about said spacing means, eachsuch set comprising two govsite sides of said spacing means, each suchweight having a spring-chamber within it, abutments for said weights,located in proximity to the outer ends of such spring chambers, a springfor each such weight, located withinthe spring chamber-of that weight,and acting against said weight and against the corresponding abutment,tension rods connecting the abutments of corresponding weights, andmeans for transmitting inward and outward motion of the weights of eachsuch set to valve control means.

6. A centrifugal governor comprising in combination a rotary carrier anda plurality of independentcentrifugal governing-means carried thereby,and separate valve-control means for suchindependent centrifugalgoverning means, each such valve control means operatively' connected toits corresponding governing means.

- PER ARVID Witnesses:

E. S. Ross, H. M. MARBLE.

PE ERSON.

. Copiesot this patent may be ohtained. for five cents each, byaddressing the Commissioner of Patents;

Washington, D. 0.!

governor springs forsaid independent weight-structures, independentvalve-control I means for said independent WGIglIt-SUHC-J a tension rod,for each such set of weights,

,ernor weights located respectively on oppo In testimony whereof I havesigned'this located respectively on opposite sides of said such weight,abutments' for said weights,

5. A centrifugal governor comprising a ro-

